PHILOSOPHICAL 
TRANSACTIONS. 
I. The Croonian Lecture. A farther investigation of the com - 
ponent parts of the Blood. By Sir Everard Home, Bart. 
V. P. R. S. 
Read November 4, 1819. 
As the capacity of one individual is rarely able to bring to 
perfection different branches of science, it is no wonder 
that, in the investigation of so complex a subject as the com- 
ponent parts of the blood, Hewson failed, Hunter fell short 
in the attempt, and Dr. Young, after the interesting discovery 
of the colouring matter being readily separated from the red 
globules, made no farther advance. This view of the sub- 
ject, led me, at the time I ventured upon this enquiry, to 
engage as my associates, Mr. Bauer, whose microscopical 
observations have been too long put to the proof, to admit of 
their being disputed ; and Professor Brande, whose chemical 
researches, and the judgment with which they have been 
pursued, are fully established. 
In two former Lectures, assisted by these skilful coadju- 
tors, I have been enabled to prove, that the human blood in the 
mdcccxx. B 
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